Back in the days of Sky Analogue when services came from 19.2° East, this was shared with a lot of German broadcasts, which the Sky boxes could receive quite easily, what with being in the same place in the sky and everything.
Does German TV still use 19.2° East?
Yes, 19.2 is the main one for Germany, Austria, France and Spain. 13°E and 23.5°E are also used by a number of countries though.
In terms of
EPG: the Sky Germany EPG is fixed yes, but only for channels 100 and above. 1-99 is what they call the "Favorites Section" that you can edit to your liking just like on FTA. So channels that you have in your Favorites appear twice on the EPG. In the favorites section where you put them and on the fixed EPG.
Vodafone has an initial EPG set on their boxes AFIAK, but that you can customize it freely.